Abstract: The lesser slag steelmaking process of 150 t BOF by using green dolomite to replace partial lime and magnesia granule is carried out at Shiheng Special Steel, and the safety of heel slag remaining operation is improved by using optimizing " slag splashing + slag adjusting" process; with reasonable slag forming schedule, blowing scheme, adding suitable slag foaming agents and controlling slagging point, the dephosphorization rate of liquid is about 60% and the slagging rate is about 50% to effectively ensure the BOF steelmaking end-point, and the each index gets optimization i. e. the consumption of lime decreases to 30. 2 kg/t from 46. 7 kg/t, the consumption of light burned magnesia granule decreases to 8. 7 kg/t from 13. 3 kg/t, the consumption of oxygen is 47. 7 m³/t and the iron and steel material charging decreases to 1072. 1 kg/t from 1075.3 kg/t to realize steelmaking with safe, lesser slag and low cost.

摘要： 石横特钢150 t转炉炼钢应用生白云石代替部分石灰和镁球进行少渣冶炼的工艺,采用优化的"溅渣+调渣"工艺改善了留渣的安全性;通过采用合理的造渣制度、吹炼制度、加入适量炉渣发泡剂、控制倒渣点,使得脱磷率约60%,排渣率约50%,有效保证了转炉的冶炼终点,各项指标得到了优化,石灰消耗从46.7 kg/t降低到30.2 kg/t;轻烧镁球消耗从13.3 kg/t降低到8.7 kg/t;氧气消耗为47.7 m³/t;钢铁料消耗从1075.3 kg/t降低到1072.1 kg/t,实现安全、低成本少渣冶炼。